Combined sectional boiler and furnace.



M. 0. .HAWLBY- COMBINED SEGTIONAL BOILER AND PUENAGE.

. y APPLICATION FILED JULY 31,1909. 95 .l1\,915 Patented Mar'. 1, 1910.

3 SHEETS-SHBET l.

l I l im annuali INN| IVI. G. HAWLEY. y COMBINED SEOTIONAL BOILBR AND FURNACE.

APPLICATION FILED JULY 31, 1909.

Patented Mar. l, 1910.

3 SHEETS-SHEET 2.

Civ

MELVILLE C. HAVLEY,

or slr. tours,

COMBINED SECTIGNAL BOBLER AND FURNAE.

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tional boiler and furnace and it has for its object the production of a furnace of this description whereby the products of conibustion may expend their heating properties within the furnace with a high degree of heating action upon the water circulating in the sections of the furnace. This result is acconiplished due to a particular construction of the fornace sections and arrangement of tie tlues therein, in order that the products of combustion will pass through the sections in several courses, including a down draft, a horizontal draft, and a vertical draft.

Figure l is a longitudinal section through iny furnace. Fig. il is a front elevation of the furnace. Fig. lll is a vertical cross section taken on line lll-Hl, Fig. l. Fig. lV is a vertical cross section taken on line fl'V-V, Fig. i. Fig. V is an enlarged vertical longitudinal section taken through one of the joints between two of the furnace sections.

ln the accompanying drawings z--i designatos the front chainbered section of my boileil furnace provided with an upper lire door 2 and a lower fire door 3 that respectively control the fire doorways 2 and 3. lnnnediately bach of the chainbered front section are chainbered sections ls within which the combustion chamber of the furnace is located and adjoining the rearinost of 'the sections il: is a cliainbered water leg section that has pendent in it, back of the combustion chamber, a water leg or inanifold 6 which extends transversely of the furnace at the rear of the combustion chaniber and downwardly to a retracted degree from the top of said chamber.

7 are hollow grate bars, preferably7 an ranged at an incline relative to a horizontai line drawn through the furnace and which serve to connect lthe water leg 6 with one of the chambers in the frontsection l beneath the tire doorway 2. The hollow grate bars 7 which are adapted to support the inain Specification of Letters Patent.

Application filed July 31, 1909.

lilatented llllar. il, teilt).

Serial No. 510,639.

body of the fuel that is burned in the fur nace are, it will be seen, located entirely in front of the water leg (l, as a consequence of which' it is necessary for the course of the draft through the body of the fuel and between the grate bars to be a downward one in order that the products of combustion from the fuel will be carried beneath the water leO.

S designates a chambered section located immediately bach of the chambered section and which is provided with an upper horizontal flue 8 at the rear of the water leg` 6, an intermediate horizontal flue 8CL beneath t-he upper fiue and located partially above the lower end of the water legl and partially beneath said water leg and a lower horizontal flue 8". The flues 8 and S through the section 8 are separated by a hollow water circulation partition 9 that is of less breadth than `the breadth of said section, in order that a part of the products of combustion passing` beneath the water leg 6 may circu- "late freely in an upward course into the flue 8 after passing beneath the water leg. The

flues 8 and 8l are separated by a water circulation partition S that is located wholly beneath the level of the lower end of the water leg G and the products of combustion enter these flues in a horizontal direction after passing downwardly through the bed of fuel on the hollow grate bars 7.

l0 designates a series of chambered sections located baclr of the chambered section 8 and which are provided with horizontal flues l0', 10a, and l0", registering respectively with the horizontal flues 8', 8a, and 8b in the chambered section. 8, and through which the products of combustion pass after passing through the horizontal flues in the section 8 to impart heat to the water circulation partitions in the sections l() through which the tlues of the sections extend. rlhe tlues 10', 10a, and l0b in the rearniost section l0 are in open communication with a flue A extending horizontally in the furnace and which may lead to the front of the fue nace, as shown in the drawings, or lead to any other point in the furnace at which it inay be desired to discharge the products of combustion that escape from the furnace.

The furnace is closed at the rear eiid by a baclr section 13 and all of the sections of the furnace are united by suitable connections, such as tie rods 14t- 'that extend longitudinally of the furnace.

chamber 8f and the sections lO have bottom chambers lOf in alinement with the bottom chamber of the section 8, as seen most clearly in Fig. I. All of the chambers 8f and lOf are arched, as illustrated in Figs. III and IV, and are in communication with the vertical partitions that surmount them, the

apex of each of the bottoni chambers being at a central location and immediately beneath the central vertical partition of the section.

At the bottom of the furnace portion of my combined boiler and furnace is an updraft burning grate 7 upon which fresh fuel may be placed, but Which is more particularly intended to receive the droppings from the down-draft grate above it., which includes the hollow grate bars 7. The combustion chamber of the furnace portion communicates immediately at the rear of the rip-draft burning grate with the 'flame space B (see Fig. I) that extends horizontally beneath the boiler and communicates with the vertical flue 12 at the rear end of the furnace with which the horizontal tlues extending through the series of chambered sections l0 also communicate.

I desire to draW particular attention to the arching of the bottom chambers surmounting the flue "B, and which have just been referred to, inasmuch as this arching provides for the rise of the hot products of combustion to the transverse center of the furnace and immediately beneath the central vertical partitions 8d and l0d of the sections 8 and l0, whereby the water in the bottom of the central vertical partitions is maintained at a higher degree of heat than the Water in the bottom of the intermediate vertical partitions in said sections, as a consequence of which there is much more rapid circulation through the central vertical partitions than in the other vertical partitions, and the water present in the several sections S and 10 rises centrally and circulates outwardly in the chambers of the sections, thereby affording rapid circulation of water that is highly desirable in order that the highest degree of water heating action in the furnace may be maintained. y

Intercommunication between the various sections of my furnace is furnished by a top conduit 16 extending longitudinally of the furnace and through thimbles 17 at thc joints between the sections and also through bottom conduits 1S extending through the various sections.

I desire it understood that I do not claim herein any invention in a down-draft furnace and boiler having a pendent water leg and front water space, and hollow grate bars inserted in the water leg and front water space, inasmuch as these features, by themselves considered, are known to me to be very old, and the construction was embodied by me in a lirebox boiler many years ago. I do claim it to be new, however, to malte a construction einbodying the foregoing and including the sets of horizontal lines extending through the water sections and into which the hot products of combustion passing from the combustion chamber are caused to be delivered partly to each liuc, due to the presence of the pendent water leg acting as a detlector to partly direct the hot products of combustion and also permit the rise thereof back of the vater leg after passing beneath it; also in cou'ibination with the. foregoing, the vertical Ihre at the back of the boiler with which the horizontal tlues coinmunicate in conimou, and the flame space located wholly bacl of the combustion chamber leading beneath the bottom hollow' water partitions communicating with the vertical flue.

I claim A combined boiler and furnace having at its forward end a furnace portion and at. its rear end a boiler portion; the furnace portion including a down-draft grate with a dcpendent water leg at the rear thereof, and a lower up-draft grate beneath the down-draft grate; and the boiler portion having a series of horizontal `llues .separated by water circulation partitions back of the furnace portion communicating with a rear vertical liuc. and at its bottom beneath said horizontal tlues a flame space providing conununication between the furnace chamber at a point in proximity to the lower 11p-draft grate and the rear vertical tine.

MELVILLE C. HVLEY.

In the presence of IVM. H. Scor'r, EDNA B. LINN. 

